This type of transport is called active transport
Predators in the environment
Active transport is the <span>method of material exchange uses up energy.</span>
All plant cells have different things too do, the bigger the job basically its gonna be larger than the ones that's not doing as much. Hope that helps, you.
It does not exist. Ca is 2+ and SiO4 is 4-, so it would in that case be Ca2SiO4, which does not exist either.